Plumbing of stainless steel, black and galvanized pipes. Advantages and disadvantages of
To begin with, let's talk about a pipeline of black steel. It is installed even in our days, because it is characterized by low cost, low deformation ability at high temperatures, and good mechanical characteristics. However, it is prone to corrosion, which arises from the influence of electromagnetic fields. This water pipe quickly overgrows with fat and various mineral deposits, which leads to a reduction in the diameter of the pipe and its throughput.
The galvanized pipeline is an alternative to black steel pipes. The zinc layer serves as a protection and allows the use of a product with a similar coating for ten years longer. They are made with the help of cold or hot galvanizing, galvanic or thermodiffusion method. Stands and water pipes are connected by welding, or on threads. For welding use electrodes with a diameter of 3 mm.with fluoride-calcium or rutile coating, and the threaded joints are sealed with fluoroplastic tape or other special material.
Galvanized water pipe is corrosion resistant, practical and economical. The only negative is the occurrence of condensation in a warm room( with cold water in it).
Plumbing of stainless steel is suitable for those who do not really think about the price. It meets all standards and standards, reliable and lasting. It is made seamless or welded. It is the seamless most reliable and durable, however the most expensive.
This water pipe contains in its composition various alloying additives, in addition to carbon and iron. It is chromium that provides long-term operation and corrosion resistance.
In recent years, a flexible stainless pipeline has been gaining popularity, which is used in complex designs of water supply systems. Distinguish matte, mirror and polished surface, which means that the pipes are characterized by an attractive appearance. There are drawbacks. These include the cost and complexity of the installation. Only a professional welder will be able to implement the installation competently and qualitatively.
Standard dimensions of steel water pipe
The diameter of the steel water pipe is measured by the internal section in inches. However, when laying it, it is necessary to pay attention to the outer diameter, since additional thread cutting may be required on the pipe wall to extend the sections.
Let's figure out how to determine the diameter of a pipe using a measuring tool.
- To measure the outer diameter, wrap the tube with a tape measure and divide it by 3.14( i.e. Pi).
- To measure the inner diameter, subtract from the outer diameter the double wall thickness, which is measured using a conventional ruler or caliper.
Typically, a conventional steel pipe for a hot and cold pipe has a diameter of ½ inch and a riser diameter of ¾ in.
By the ratio of "diameter-thickness of the wall" distinguish light( most often used in gas mains), ordinary and reinforced pipeline.
Ways to connect a steel water pipe
As we said above, steel pipes are connected by electric, gas welding or threading. Before you start welding, you need to carefully handle the edges of the pipe. The place for the welding joint must be cleaned of dirt and corrosion until a metallic luster appears. If this is not done, the welding seam will most likely be porous and brittle. This procedure is performed no earlier than four hours before welding. Pay attention to such moments:
- pipe should be without significant defects( small dents can be straightened);
- the thickness of the welding parts must be the same and uniform;
- check the bevel angle and the size of the edges.
The number of seams depends on the thickness of the pipe wall, with each seam applied in the opposite direction to the previous one.
